I have set an Alarm Manager which will show Notification 10 seconds after app will be destroyed.
But it's not working.
Here's my onDestroy() code:
#Override
public void onDestroy() {
super.onDestroy();
Intent myIntent = new Intent(this, alarmManager.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, myIntent,0);
AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
//alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, 10*1000, 10*1000, pendingIntent);
alarmManager.cancel(pendingIntent);
}
and here is alarmManager.class:
public class alarmManager extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Intent service1 = new Intent(context, Notification.class);
context.startService(service1);
}
}
and here is Notification.class:
public class Notification extends Service {
#Override
public void onCreate() {
super.onCreate();
Intent mainIntent = new Intent(this, Main.class);
NotificationManager notificationManager
= (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE);
android.app.Notification noti = new NotificationCompat.Builder(this)
.setAutoCancel(true)
.setContentIntent(PendingIntent.getActivity(this, 0, mainIntent,
PendingIntent.FLAG_UPDATE_CURRENT))
.setContentTitle("Title")
.setContentText("It's been so Long!!!")
.setSubText("Please return back to App")
.setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))
.setVibrate(new long[] {1000,1000,1000,1000})
.setSmallIcon(R.drawable.ic_launcher)
.setTicker("Important Notification")
.setWhen(System.currentTimeMillis())
.build();
notificationManager.notify(0, noti);
}
*I've been working on this since many days, but I am unable to get through it.
Any Help would be highly* appreciated.
Thanks in advance.
There are some relatively minor changes to make, but overall you've got the necessary code.
You don't need a Service for this. Move the code to create the Notification to the BroadcastReceiver, and replace this with context everywhere.
Make sure your BroadcastReceiver is listed in the manifest.
Don't use setRepeating() for the alarm; use set(). You only need it to fire once.
Remove the following line: alarmManager.cancel(pendingIntent);
Those are the changes necessary to get it working. However, you might also consider removing the sound and vibration from the Notification, and treat it more like a status message. It would also be preferable to rename your BroadcastReceiver class. Perhaps something like AlarmReceiver, to be in keeping with Java class naming conventions, and to avoid confusion with the AlarmManager class.
Related
I'm trying to do a simple Alarm manager, and although I'm adding a delay of 5 second,
the alarm in my phone goes off immediately.
I'm aware that in my receiver the alarm says to go off now,
but I understood that you set the delay to when you want it to go off at the pending intent.
what am I doing wrong ?
here is my alarm intent:
AlarmManager manager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent (AlarmClockScreen.this, AlarmNotificationReciever.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, intent, 0);
manager.set(AlarmManager.RTC_WAKEUP, SystemClock.elapsedRealtime()+5000,pendingIntent);
and here is my Receiver
public class AlarmNotificationReciever extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
builder.setAutoCancel(true)
.setDefaults(Notification.DEFAULT_ALL)
.setWhen(System.currentTimeMillis())
.setSmallIcon(android.R.mipmap.sym_def_app_icon)
.setContentTitle("Alarm TITLE")
.setContentText("I will finish, What you started")
.setDefaults(Notification.DEFAULT_LIGHTS | Notification.DEFAULT_SOUND)
.setContentInfo("Info");
NotificationManager notificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(1,builder.build());
}
}
fixed it by adding
Calendar time = Calendar.getInstance();
time.setTimeInMillis(System.currentTimeMillis());
time.add(Calendar.SECOND, 30);
and then using time.getTimeInMillis()
that's my code for scheduled notification for my android app, but it does nothing for some reason. Please tell me where is the problem.
Another question: I also made a button which send a notification - just for learning, and for some reason it works only on my samsung s6. When I run the app on the android studio emulator it gives me an error about notification package. Why is that?
Thank a lot!
public void setAlarm(View view) {
Long alertTime = new GregorianCalendar().getTimeInMillis()+5*1000;
Intent alertIntent = new Intent(this, AlertReceiver.class);
AlarmManager alarmManager = (AlarmManager)
getSystemService(Context.ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, alertTime,
PendingIntent.getBroadcast(this, 1, alertIntent, PendingIntent.FLAG_UPDATE_CURRENT));
}
}
public class AlertReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
createNotification(context, "Time Up", "5 Seconds Has Passed", "Alert");
}
public void createNotification(Context context, String msg, String msgText, String msgAlert) {
PendingIntent noficitIntent = PendingIntent.getActivity(context, 0,
new Intent(context, MainActivity.class), 0);
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context)
.setSmallIcon(R.drawable.ic_launcher)
.setContentTitle(msg)
.setTicker(msgAlert)
.setContentText(msgText);
mBuilder.setContentIntent(noficitIntent);
mBuilder.setDefaults(NotificationCompat.DEFAULT_SOUND);
mBuilder.setAutoCancel(true);
NotificationManager mNotificationManager =
(NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.notify(1, mBuilder.build());
}
}
Based on your comments, it seems you just forgot to register your BroadcastReceiver. Per Android docs you will only be able to receive intents on your receiver if you register it first:
You can either dynamically register an instance of this class with Context.registerReceiver() or statically declare an implementation with the tag in your AndroidManifest.xml.
Since you are sending a broadcast directly to your receiver like that:
Intent alertIntent = new Intent(this, AlertReceiver.class);
There is no point in declaring any intent-filter for it, so you just need to add the following line to your AndroidManifest.xml (inside <application> tag):
<receiver android:name="com.your.package.AlertReceiver" />
Hope it helps.
Well I have tried enough to look for the answer to the question mentioned above, but my efforts have been futile so far.
I have created an alarm with the help of the alarmmanager class which will fire up the notification at regular intervals of time(probably about 5 days).
Below is the code for the implementation of the alarm happening inside onClick() of a button.
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
Intent notificationIntent = new Intent("android.media.action.DISPLAY_NOTIFICATION");
notificationIntent.addCategory("android.intent.category.DEFAULT");
PendingIntent broadcast = PendingIntent.getBroadcast(this, 100, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
Calendar cal = Calendar.getInstance();
if(fromDateEtxt.getText().toString().length()>0) {
cal.add(Calendar.HOUR_OF_DAY, 10);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,cal.getTimeInMillis(), 5 * 24 * 60 * 60 * 1000, broadcast);
}
The code for the broadcast receiver.
public class AlarmReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Intent notificationIntent = new Intent(context, NotificationActivity.class);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
stackBuilder.addParentStack(NotificationActivity.class);
stackBuilder.addNextIntent(notificationIntent);
PendingIntent pendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
Notification notification = builder.setContentTitle("Demo App Notification")
.setContentText("New Notification From Demo App..")
.setTicker("New Message Alert!")
.setSmallIcon(R.mipmap.ic_launcher)
.setContentIntent(pendingIntent).build();
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(0, notification);
}}
The onClick() method apart from starting of the alarm changes the activity also. Now the problem I am facing is I dont know really how to stop the repeating alarm. I want to stop the alarm on a particular date. Secondly, I was confused whether to use the alarm.cancel for cancelling the alarm or to use another alarm for cancellation of the previous alarm as shown here. Apart from this, I wanted to know if the alarm could be cancelled from another activity or does the point seems unnecessary and the limit to the date could be set beforehand?
I am building a simple android app for java tutorial in which i want to keep one read later option using which the user can schedule a time for reading and at the specified time my app should give a notification to the user. Even if my app is not opened at that time he should get the notification in notifications bar.I am a newbie in android and have no idea about how to do this.Can someone please help me out?As a i am a newbie a detailed explanation can be more helpful.Thanks in advance :-)
To schedule a delayed notification, you
1) Create a BroadcastReceiver that will receive the event:
public class MyReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
//you might want to check what's inside the Intent
if(intent.getStringExtra("myAction") != null &&
intent.getStringExtra("myAction").equals("notify")){
NotificationManager manager =
(NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
.setSmallIcon(R.drawable.yourIcon)
//example for large icon
.setLargeIcon(BitmapFactory.decodeResource(context.getResources(), R.mipmap.ic_launcher))
.setContentTitle("my title")
.setContentText("my message")
.setOngoing(false)
.setPriority(NotificationCompat.PRIORITY_DEFAULT)
.setAutoCancel(true);
Intent i = new Intent(context, YourTargetActivity.class);
PendingIntent pendingIntent =
PendingIntent.getActivity(
context,
0,
i,
PendingIntent.FLAG_ONE_SHOT
);
// example for blinking LED
builder.setLights(0xFFb71c1c, 1000, 2000);
builder.setSound(yourSoundUri);
builder.setContentIntent(pendingIntent);
manager.notify(12345, builder.build());
}
}
}
Don't forget to declare it in the Manifest:
<receiver
android:name="your.package.name.MyReceiver"
android:exported="false" />
2) Schedule the action (assumed you do it from an Activity):
//will fire in 60 seconds
long when = System.currentTimeMillis() + 60000L;
AlarmManager am = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(this, MyReceiver.class);
intent.putExtra("myAction", "mDoNotify");
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
am.set(AlarmManager.RTC_WAKEUP, when, pendingIntent);
3) You're done
//Disclaimer: haven't compiled the code, typos possible. The rest is your homework ;)
Use AlarmManager to solve your problem. And when alarm is received, you can send a notification too.
See this sample app in android's tutorial for implementing the alarms.
I have set up a notification which will be shown 4 hours after the App being destroyed.
But as I am destroying the App, the notification is coming immediately and also after 4 hours.
Here's my Main Activity's onDestroy():
#Override
public void onDestroy() {
super.onDestroy();
Intent myIntent = new Intent(this, AlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, myIntent,0);
AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
//alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, 3600*1000*4, 3600*1000*4, pendingIntent);
}
and here's my AlarmReceiver.class:
public class AlarmReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Intent mainIntent = new Intent(context, Main.class);
NotificationManager notificationManager
= (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
android.app.Notification noti = new NotificationCompat.Builder(context)
.setAutoCancel(true)
.setContentIntent(PendingIntent.getActivity(context, 0, mainIntent,
PendingIntent.FLAG_UPDATE_CURRENT))
.setContentTitle("Title")
.setContentText("It's been so Long!!!")
.setSubText("Please return back to App & Learn more Duas.")
.setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))
.setVibrate(new long[] {700,700,700,700})
.setSmallIcon(R.drawable.ic_launcher)
.setTicker("Important Notification")
.setWhen(System.currentTimeMillis())
.build();
notificationManager.notify(0, noti);
}
}
I want that Notification should be shown after every 4 hours & not immediately of App being destroyed.
Any help would be highly Appreciated.
Thanks in Advance.
It is because of small mistake
just change this line
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, 3600*1000*4, 3600*1000*4, pendingIntent);
TO this
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, (System.currentTimeMillis()+(3600*1000*4)), 3600*1000*4, pendingIntent);